[Google Analytics 4 - Web] - adding hyperlink to field description (#3362)

Author: joe-ayoub-segment

packages/browser-destinations/destinations/google-analytics-4-web/src/generated-types.ts

@@ -204,7 +204,7 @@ export const destination: BrowserDestinationDefinition<Settings, Function> = {
       default: true
     },
     domain: {
-      description: 'A custom domain to load the Google Analytics script from.',
+      description: "A custom domain to load the Google Analytics script from. For more information see [Google's Documentation](https://developers.google.com/tag-platform/tag-manager/server-side/dependency-serving?tag=gtag&option=cdn).",
       label: 'Domain',
       type: 'string',
       default: 'www.googletagmanager.com'